Six-wheel railway car truck



I. A. LAMONT.

SIX WHEEL RAILWAY CAB TRUCK.

' I APPLICATION FILED JAN-30. I922. 1,418,308.

Patefited June 6,1922.

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J. A. LAMONT.

SIX WHEEL RAILWAY CAR TRUCK.

APPLICATION FILED JAN-30,1922.

1,418,308. PatentedJune 6, 1922.

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JOHN A. LAMONT, OF CHICAGO, ILLINOIS, AfdSIGNOR 739 AMERICAN STEEL FO'UEDEIES,

OF CHICAGO, ILLINOIS, A CORPORATION OF six-WHEEL EAILWAY- can TRUCK.

Specification of Letters Patent. Pafibeintedl June 6, 1922,

Application filed January 30, 1922. Serial No. 532,592.

To all whom it may concern: 7

Be it known that 1, JOHN A. LAMONT, a citizen of the United States, residing at Chicago, in the county of (look and State of Illinois, have invented certain new'and use ful Improvements in Six-WV heel Railway Car Trucks, of which the following is a specification. 1

This inventionrrelates to six-wheel railway car trucks.

One object of my invention is to provide a simple and efficient six wheel railway car truck which is flexible in operation and in which the loads are equalized in a simple and efficient manner.

Another obj ect is to provide a durable and flexible six-wheel car truck having its various parts arranged to cooperate in a manner to meet all'of the requirements for successful commercial operation.

These and other objects are accomplished by means of the arrangement disclosed by the accompanying sheets ofjdrawings, in which I Figure 1 is a fragmentary side elevation of a railway car truck embodying my in vention;

Figure 2 is a fragmentary top plan view of the same truck;

Figure 3 is a sectional view taken in the plane of line 38 of Figure 2; and

Figure 4 is a sectional view taken in the plane of line 4-4 of Figure 2.

The various novel features of my invention will be apparent from the following description and drawings, and will be particularly pointed out in the appended claims.

'Referring to the figures of the drawings, it will be noted that this railway car truck includes a side frame 10 having formed therein end journal box openingsll for the reception of end journal boxes 12. Said side frame also includes openings13 for the re ception of end portions of separate cross bolster members 14 and 15. The third piece of this bolster takes the form of an equalizing bolster member 16. This three-piece bolster, with the exception of a few new details, is fully described and claimed per se in my Patent Number 1,377,706, granted May 10, 1921.

Equalizing levers 17 and 18 pivotally connected at 19 and 20 respectively, to the side frame between the side walls 21 and 22 there of, transmit the loads from the cross bolster members 14 and 15 to the intermediate journal boxes 23. Interposed between the end portions of the cross bolster members 1 and 15 and the spring seat portionsof the equalizing levers l7 and 18, are nests of springs 24 and 25 respectively, the ends of the cross bolster members 14 and 15 being guided in their vertical movements by the These equalizing levers l7 and 18are in the form of trusses in that each of them has a tension member 26and a compression member 27 with a strut member 28 interposed therebetween. One of the equalizing levers 17 isprovided with pedestal aws 29 for the reception of the in termediatejournal box 23. This intermediate journal box is rigidly received between the jaws 29 so that in effect it is the Same as integrally formed therewith, thereby preventing an-y tilting of the journal box. The cooperating end of the other equalizing lever 18 is telescopically received between the side walls 80 at the inner end of the jawed equalizing lever 17.

side walls forming the openings 13 in the side frame member 10.

By means of the truss type of equalizing the box and causing the truck wheel axles to get out of parallel. This, in turn, results in excessive flange and track wear. This equalizing lever arrangement also provides a simple and eflicient scheme whereby the loads are equally distributed to the various journal boxes. By providing the three-piece bolster hereinabove mentioned, great flexibility results which aids in equally distributing the load on all wheels for maintaining same in contact with the track for it is an established fact that, due to the rigidity of the single-piece integrally-formed truck bolster having four legs as used in connection with six-wheel trucks, the load transmitted from the center plate is not always equally distributed.

The bolster members 14 and 15 are pro vided With vertically arranged guides or stopsBi and 32 for limiting relative lateral movement of said bolster members and side frames.

It is my intention to cover all modifications of the invention falling Within the spirit and scope of the following claims.

I claim 1' 1. In a six-Wheel car truck, the combination of a side frame having journal box openings for the reception of the end journal boxes, equalizing levers operatively con nected to said side frame, one of said equalizing levers having an opening for the reception of an intermediate journal box, and a flexible bolster having separate transverse;

members Which are operatively associated. with said equalizing levers for transmitting loads through said equalizing levers to all of said journal boxes. 1

2. In a six-Wheel car truck, the combination of a side frame having end journal. box openings for the reception'of end journal boxes, equalizing levers pivotally connected to said side frame, one of said equalizing levers having an opening for the reception of an intermediate journal box, springs carriedby said equalizing levers, and a flexible bolster having separate transverse members which rest upon said springs and transmit leads through said springs andequalizing levers to all of said journal boxes.

3. In a six-Wheel car truck, the combination of a side frame having end journal box openings for the reception of journal boxes, equahzing levers plvotally connected at their outer ends to said side frame and being telescopically arranged at their inner ends, one

may be transmittedto said equalizing levers and then to all of said journal boxes for equally distributing the load therebetvveen. 4-. In a six-Wheel car truck, the combination of a side frame havingend journal box openings for the reception of journal boxes, equalizing levers the outer ends of Which are pivotally connected to said side frame and the inner ends of which are telescopically arranged, one of said equalizing levers having jaws for the reception of an inter mediate journal box, said equalizing levers having tension and compression members spaced apart, springs mounted on, said tension members, and a bolster having separate cross'bolster members resting on said springs intermediate the tension and compression members for transmitting loads through said springs and equalizing levers to all of said journal boxes. I

5. In a six-vvheel car truck, the combination of aside frame having end journal box openings for the reception of journal boxes, equalizing leversthe outer ends of Which are pivotally connected to said side frame and the inner ends of Whichare telescopically arranged, one of saidequalizing levers having jaws for the reception of. an intermediate journal box, said equalizing levershaving tension and compression members spaced apart, springs mounted on said tension members, a bolster having separate cross bolster members resting on said springs intermediate/the tension and compression members for transmitting loads through said springs, and equalizing levers to all of said journal boxes, and stop members on said bolster members for limiting relative lateral movement of said bolster members and side frame.

Signed at Chicago, Illinois, this 23rd'day of January, 1922. p

JOHN A. LAMONT. 

